/* ========================================
   BiSTEM24 HEADER — BRAND COLORS
======================================== */

:root {
  --header-navy: #182f55;
  --header-blue: #2479ad;
  --header-orange: #ed7d24;
  --header-text: #263746;
  --header-muted: #64717b;
  --header-light: #f5f8fb;
  --header-border: #e5eaf0;
  --header-white: #ffffff;
}

.site-header {
  position: relative;
  z-index: 1000;
  width: 100%;
  background: var(--header-white);
  font-family: Arial, Helvetica, sans-serif;
}

.site-header * {
  box-sizing: border-box;
}

.header-container {
  width: min(1160px, 92%);
  margin: 0 auto;
}

/* ========================================
   TOP CONTACT BAR
======================================== */

.header-topbar {
  background: var(--header-light);
  border-bottom: 1px solid var(--header-border);
}

.header-topbar-inner {
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.header-contact,
.header-top-right {
  display: flex;
  align-items: center;
  gap: 13px;
}

.header-contact a,
.header-top-link {
  color: var(--header-muted);
  font-size: 11px;
  text-decoration: none;
  transition: color 0.2s ease;
}

.header-contact a:hover,
.header-top-link:hover {
  color: var(--header-blue);
}

.header-contact-icon {
  margin-right: 6px;
  color: var(--header-blue);
}

.header-top-divider {
  width: 1px;
  height: 15px;
  background: #d7dfe7;
}

.header-social-mini {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-social-mini a {
  color: var(--header-navy);
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.2s ease;
}

.header-social-mini a:hover {
  color: var(--header-orange);
}

/* ========================================
   MAIN HEADER
======================================== */

.header-main {
  background: var(--header-white);
  border-bottom: 1px solid #edf0f3;
}

.header-main-inner {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

/* Official logo */
.header-logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  text-decoration: none;
}

.header-logo-image {
  display: block;
  width: 175px;
  height: 65px;
  max-width: 100%;
  object-fit: contain;
  object-position: left center;
}

/* ========================================
   NAVIGATION
======================================== */

.header-navigation {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
}

.header-navigation > a {
  position: relative;
  padding: 12px 0;
  color: var(--header-text);
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.header-navigation > a:not(.header-donate-button)::after {
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--header-orange);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.header-navigation > a:not(.header-donate-button):hover,
.header-navigation > a[aria-current="page"] {
  color: var(--header-blue);
}

.header-navigation > a:not(.header-donate-button):hover::after,
.header-navigation > a[aria-current="page"]::after {
  transform: scaleX(1);
}

/* Donate button */
.header-navigation > .header-donate-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 21px;
  border: 1px solid var(--header-orange);
  border-radius: 3px;
  background: var(--header-orange);
  color: var(--header-white);
  font-size: 11px;
  font-weight: 700;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.header-navigation > .header-donate-button:hover {
  transform: translateY(-1px);
  border-color: #d96b18;
  background: #d96b18;
  color: var(--header-white);
}

/* ========================================
   MOBILE MENU BUTTON
======================================== */

.header-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 8px;
  border: 1px solid var(--header-border);
  border-radius: 4px;
  background: var(--header-white);
  cursor: pointer;
}

.header-menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  background: var(--header-navy);
}

/* ========================================
   TABLET
======================================== */

@media (max-width: 1050px) {
  .header-main-inner {
    gap: 20px;
  }

  .header-logo-image {
    width: 155px;
    height: 60px;
  }

  .header-navigation {
    gap: 15px;
  }

  .header-navigation > a {
    font-size: 10px;
  }

  .header-navigation > .header-donate-button {
    padding: 12px 15px;
  }
}

/* ========================================
   MOBILE
======================================== */

@media (max-width: 760px) {
  .header-topbar-inner {
    min-height: 34px;
  }

  .header-contact a,
  .header-top-link {
    font-size: 10px;
  }

  .header-top-right {
    gap: 8px;
  }

  .header-social-mini {
    gap: 8px;
  }

  .header-main-inner {
    position: relative;
    min-height: 76px;
  }

  .header-logo-image {
    width: 150px;
    height: 56px;
  }

  .header-menu-toggle {
    display: block;
    flex-shrink: 0;
  }

  .header-navigation {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 10px 18px 18px;
    border: 1px solid var(--header-border);
    border-top: none;
    background: var(--header-white);
    box-shadow: 0 10px 22px rgba(24, 47, 85, 0.1);
  }

  .header-navigation.is-open {
    display: flex;
  }

  .header-navigation > a {
    padding: 14px 5px;
    border-bottom: 1px solid #edf0f3;
    font-size: 12px;
  }

  .header-navigation > a:not(.header-donate-button)::after {
    display: none;
  }

  .header-navigation > .header-donate-button {
    align-self: flex-start;
    margin-top: 12px;
    padding: 13px 20px;
    border-bottom: none;
  }
}

/* ========================================
   SMALL MOBILE
======================================== */

@media (max-width: 420px) {
  .header-container {
    width: 94%;
  }

  .header-logo-image {
    width: 135px;
    height: 52px;
  }

  .header-contact a {
    font-size: 9px;
  }

  .header-social-mini {
    display: none;
  }
}